Beginning on Monday, June 8, more than 1,300 research abstracts will be presented during the scientific program at SLEEP 2009, showcasing the latest findings in sleep research from around the world.
The majority of the abstracts will be on display as poster presentations from 10:15 a.m. to 12:15 p.m. Pacific Time, Monday, June 8, to Wednesday, June 10. Each poster will be displayed for one day only. Abstract authors will be available at their posters to discuss their findings with meeting attendees.
Select abstracts will be presented as brief oral presentations during scheduled sessions from Monday, June 8, to Thursday, June 11. Sessions involve a common theme and consist of either four abstract presentations during a one-hour session, or eight presentations during a two-hour session. Each oral presentation is 10 minutes long and is followed by five minutes of questions from the audience.
Eight “late-breaking abstracts” were selected for presentation during a special session from 10:15 a.m. to 12:15 p.m. on Thursday, June 11. These oral presentations involve high-quality, emerging data found between December 2008 and March 2009.
The abstracts being presented at SLEEP 2009 were recently published in a special supplement of the journal SLEEP. You can download the abstract supplement as a 11 MB file in PDF format.
SLEEP 2009 will begin with the plenary session from 8 a.m. to 10 a.m. Pacific Time on Monday. Look for live updates to be posted to the SLEEP 2009 blog until the meeting ends at 12:15 p.m. on Thursday, June 11.
Showing posts with label abstract. Show all posts
Showing posts with label abstract. Show all posts
Sunday, June 7, 2009
Wednesday, May 27, 2009
Welcome to the SLEEP 2009 Blog
Welcome to the official blog of SLEEP 2009, the 23rd Annual Meeting of the Associated Professional Sleep Societies, a joint venture of the American Academy of Sleep Medicine and the Sleep Research Society.
More than 6,500 sleep specialists, sleep scientists, sleep technologists, allied health professionals and students are expected to attend SLEEP 2009 at the Washington State Convention and Trade Center in downtown Seattle, Wash. The scientific program will begin with the plenary session at 8 a.m. Pacific Time on Monday, June 8.
During the plenary session Dr. Howard Roffwarg will give the keynote address on “Participation of REM Sleep in the Development of the Brain: Starting Hypothesis, Unfolding Data, Current Perspective.” Roffwarg is professor of psychiatry and human behavior, and director of the departmental division of sleep medicine, at the University of Mississippi Medical Center in Jackson, Miss.
More than 1,300 research abstracts will be presented at SLEEP 2009. The scientific program also includes symposia, clinical workshops and discussion groups on topics ranging from neuroscience and genetics to dreams, sleep deprivation and aging. Clinical sleep specialists will discuss current practices in the diagnosis and treatment of sleep disorders such as insomnia, narcolepsy, and sleep apnea.
The meeting also features an exhibit hall with booth displays from about 120 pharmaceutical companies, equipment manufacturers, medical publishers, software companies, professional organizations and schools.
Look for live updates to be posted to the SLEEP 2009 blog from the morning of Monday, June 8, until SLEEP 2009 ends at 12:15 p.m. Pacific Time on Thursday, June 11. If you’re unable to attend SLEEP 2009, then this blog will keep you up to date with breaking news and research highlights from Seattle.
More than 6,500 sleep specialists, sleep scientists, sleep technologists, allied health professionals and students are expected to attend SLEEP 2009 at the Washington State Convention and Trade Center in downtown Seattle, Wash. The scientific program will begin with the plenary session at 8 a.m. Pacific Time on Monday, June 8.
During the plenary session Dr. Howard Roffwarg will give the keynote address on “Participation of REM Sleep in the Development of the Brain: Starting Hypothesis, Unfolding Data, Current Perspective.” Roffwarg is professor of psychiatry and human behavior, and director of the departmental division of sleep medicine, at the University of Mississippi Medical Center in Jackson, Miss.
More than 1,300 research abstracts will be presented at SLEEP 2009. The scientific program also includes symposia, clinical workshops and discussion groups on topics ranging from neuroscience and genetics to dreams, sleep deprivation and aging. Clinical sleep specialists will discuss current practices in the diagnosis and treatment of sleep disorders such as insomnia, narcolepsy, and sleep apnea.
The meeting also features an exhibit hall with booth displays from about 120 pharmaceutical companies, equipment manufacturers, medical publishers, software companies, professional organizations and schools.
Look for live updates to be posted to the SLEEP 2009 blog from the morning of Monday, June 8, until SLEEP 2009 ends at 12:15 p.m. Pacific Time on Thursday, June 11. If you’re unable to attend SLEEP 2009, then this blog will keep you up to date with breaking news and research highlights from Seattle.
Thursday, June 12, 2008
Teens Benefit from Delayed School Start Time
A study (ID# 1118) from Israel that is being presented as an oral presentation this morning at SLEEP 2008 shows that teens may have improved attention and concentration when their school start time is delayed.
The study involved 47 eighth-grade students from two classes. A control group began school at the regular time (7:30 a.m.) each day for two weeks. The experimental group began the schoolday one hour later (8:30 a.m.) during week one and then at the usual time during week two.
During the first week, students in the experimental group woke up an average of 51 minutes later each morning than students in the control group. Bedtime remained the same.
The experimental group performed better than the control group on two cognitive tests that were performed on the fifth day of the first week. They had a better overall attention score on a computerized test and made fewer mistakes on a paper-and-pencil test.
According to the American Academy of Sleep Medicine, teens need a little more than nine hours of sleep each night to be alert the next day.
The SLEEP 2008 abstract book is available online at http://www.journalsleep.org/PDF/AbstractBook2008.pdf.
The study involved 47 eighth-grade students from two classes. A control group began school at the regular time (7:30 a.m.) each day for two weeks. The experimental group began the schoolday one hour later (8:30 a.m.) during week one and then at the usual time during week two.
During the first week, students in the experimental group woke up an average of 51 minutes later each morning than students in the control group. Bedtime remained the same.
The experimental group performed better than the control group on two cognitive tests that were performed on the fifth day of the first week. They had a better overall attention score on a computerized test and made fewer mistakes on a paper-and-pencil test.
According to the American Academy of Sleep Medicine, teens need a little more than nine hours of sleep each night to be alert the next day.
The SLEEP 2008 abstract book is available online at http://www.journalsleep.org/PDF/AbstractBook2008.pdf.
REM Sleep, Short Sleep Duration & Child Obesity
A study from the University of Pittsburgh (ID# 0195) that is being presented as an oral presentation this morning at SLEEP 2008 takes a deeper look at the relationship between short sleep duration and obesity. The study concludes that a core aspect of this association may be reduced amounts of rapid eye movement (REM) sleep.
The study involved 335 children and teens between the ages of seven and 17 years. Sleep was measured by polysomnography for three consecutive nights. Compared with normal-weight children, overweight children slept about 22 minutes less per night.
Overweight children also had shorter REM sleep periods, lower REM activity and density, and longer latency to the first REM period. After adjusting for other factors, one hour less of REM sleep increased the risk of being overweight by about three times, while one hour less of total sleep increased the odds of overweight by about two times.
According to the American Academy of Sleep Medicine, the complex process of sleep involves multiple stages that make up a sleep cycle. Most adults will go through four to six cycles in a full night of sleep. REM sleep tends to be the final stage of the sleep cycle in normal adult sleep.
The SLEEP 2008 abstract book is available online at http://www.journalsleep.org/PDF/AbstractBook2008.pdf.
The study involved 335 children and teens between the ages of seven and 17 years. Sleep was measured by polysomnography for three consecutive nights. Compared with normal-weight children, overweight children slept about 22 minutes less per night.
Overweight children also had shorter REM sleep periods, lower REM activity and density, and longer latency to the first REM period. After adjusting for other factors, one hour less of REM sleep increased the risk of being overweight by about three times, while one hour less of total sleep increased the odds of overweight by about two times.
According to the American Academy of Sleep Medicine, the complex process of sleep involves multiple stages that make up a sleep cycle. Most adults will go through four to six cycles in a full night of sleep. REM sleep tends to be the final stage of the sleep cycle in normal adult sleep.
The SLEEP 2008 abstract book is available online at http://www.journalsleep.org/PDF/AbstractBook2008.pdf.
Sleep and Suicide in Children and Teens
Two studies being presented as oral presentation this morning at SLEEP 2008 address the relationship between sleep and suicidal behavior in children.
A study (ID# 0194) of 450 boys and 348 girls examined how children may be affected when a parent has a history of chronic insomnia. The children in the study had an average age of 14.4 years.
Teens with a parental history of chronic insomnia were much more likely to report having suicidal thoughts than teens without a parental history of insomnia (16.7% vs. 5.3%); they also were more likely to have a suicide plan (9.5% vs. 1.5%) and to have attempted suicide (9.5% vs. 1.7%).
Another study (ID# 0180) involved 303 children and teens with bipolar disorder and unipolar disorder during depressive episodes. The children in the study had an average age of 12.8 years.
Results show that 83.8 percent of the children had sleep disturbances. The presence of sleep complaints showed a significant association with suicidal behavior. Children with bipolar disorder were more likely than children with unipolar disorder to report suicidal behaviors with sleep complaints, classified as suicidal thoughts (58% vs. 35.6%), desire to die (58% vs. 31.5%), suicide plans (55.5% vs. 22.3%), and suicide attempt (40.7% vs. 19.8%).
The SLEEP 2008 abstract book is available online at http://www.journalsleep.org/PDF/AbstractBook2008.pdf.
A study (ID# 0194) of 450 boys and 348 girls examined how children may be affected when a parent has a history of chronic insomnia. The children in the study had an average age of 14.4 years.
Teens with a parental history of chronic insomnia were much more likely to report having suicidal thoughts than teens without a parental history of insomnia (16.7% vs. 5.3%); they also were more likely to have a suicide plan (9.5% vs. 1.5%) and to have attempted suicide (9.5% vs. 1.7%).
Another study (ID# 0180) involved 303 children and teens with bipolar disorder and unipolar disorder during depressive episodes. The children in the study had an average age of 12.8 years.
Results show that 83.8 percent of the children had sleep disturbances. The presence of sleep complaints showed a significant association with suicidal behavior. Children with bipolar disorder were more likely than children with unipolar disorder to report suicidal behaviors with sleep complaints, classified as suicidal thoughts (58% vs. 35.6%), desire to die (58% vs. 31.5%), suicide plans (55.5% vs. 22.3%), and suicide attempt (40.7% vs. 19.8%).
The SLEEP 2008 abstract book is available online at http://www.journalsleep.org/PDF/AbstractBook2008.pdf.
Higher Blood Pressure in Children with Breathing Problems during Sleep
A study (ID# 0187) being presented as an oral presentation this morning at SLEEP 2008 shows that sleep disordered breathing of any level of severity is associated with increased levels of blood pressure in children.
The Australian study involved 88 children between the ages of seven and 13 years. Twenty of these children were non-snoring controls who were recruited from the community.
Mean arterial pressure (MAP) was lower in the control group both before falling asleep and during sleep. MAP was elevated during sleep in children with either primary snoring, mild obstructive sleep apnea (OSA), or moderate to severe OSA.
More information about obstructive sleep apnea in children is available from the American Academy of Sleep Medicine at http://www.sleepeducation.com/Disorder.aspx?id=71.
The Australian study involved 88 children between the ages of seven and 13 years. Twenty of these children were non-snoring controls who were recruited from the community.
Mean arterial pressure (MAP) was lower in the control group both before falling asleep and during sleep. MAP was elevated during sleep in children with either primary snoring, mild obstructive sleep apnea (OSA), or moderate to severe OSA.
More information about obstructive sleep apnea in children is available from the American Academy of Sleep Medicine at http://www.sleepeducation.com/Disorder.aspx?id=71.
Wednesday, June 11, 2008
Insomnia Linked to Increased Risk of High Blood Pressure
“The medical impact of chronic insomnia has been underestimated,” said researcher Alexandros Vgontzas at the conclusion of his oral presentation this afternoon at SLEEP 2008.
In a study (ID# 685) of 1,741 men and women from Central Pennsylvania, Vgontzas and colleagues found that having insomnia and a short sleep duration of less than or equal to five hours increased the risk of high blood pressure by five times. Having insomnia and sleeping for five to six hours made individuals three times more likely to have high blood pressure. Without a complaint of insomnia, short sleep duration of less than or equal to five hours increased the risk of high blood pressure by only 1.5 times.
Sleep time was recorded during one night in a sleep laboratory. “Insomnia” was defined as a complaint of insomnia for more than or equal to one year.
Vgontzas, of Hershey Medical Center in Hershey, Pa., indicated that these results show that insomnia with a short sleep duration may raise the risk of high blood pressure at a rate that is similar to obstructive sleep apnea.
The SLEEP 2008 abstract book is available online at http://www.journalsleep.org/PDF/AbstractBook2008.pdf.
In a study (ID# 685) of 1,741 men and women from Central Pennsylvania, Vgontzas and colleagues found that having insomnia and a short sleep duration of less than or equal to five hours increased the risk of high blood pressure by five times. Having insomnia and sleeping for five to six hours made individuals three times more likely to have high blood pressure. Without a complaint of insomnia, short sleep duration of less than or equal to five hours increased the risk of high blood pressure by only 1.5 times.
Sleep time was recorded during one night in a sleep laboratory. “Insomnia” was defined as a complaint of insomnia for more than or equal to one year.
Vgontzas, of Hershey Medical Center in Hershey, Pa., indicated that these results show that insomnia with a short sleep duration may raise the risk of high blood pressure at a rate that is similar to obstructive sleep apnea.
The SLEEP 2008 abstract book is available online at http://www.journalsleep.org/PDF/AbstractBook2008.pdf.
Snack Attack: Short Sleep Promotes an Increase in Snacking
A study (ID# 0355) being presented as a poster presentation this afternoon at SLEEP 2008 shows that people who restrict their sleep are likely to increase the amount of snacks they eat. The authors conclude that this behavior may contribute to the increased risk of weight gain and obesity associated with short sleep hours.
The study involved 11 healthy volunteers with an average age of 39 years. Caloric intake was monitored for 14 days when sleep was restricted to 5.5 hours in bed each night, and for 14 days of 8.5 hours in bed each night.
Results show that meal intake remained similar in the two conditions, but subjects consumed more energy from snacks during the period of sleep restriction. The carbohydrate content of snacks also increased during restricted sleep.
Energy expenditure was comparable during the two sleep conditions, as were the levels of leptin and ghrelin, two hormones involved in appetite regulation.
According to the American Academy of Sleep Medicine, most adults need about seven to eight hours of sleep each night.
The SLEEP 2008 abstract book is available online at http://www.journalsleep.org/PDF/AbstractBook2008.pdf.
The study involved 11 healthy volunteers with an average age of 39 years. Caloric intake was monitored for 14 days when sleep was restricted to 5.5 hours in bed each night, and for 14 days of 8.5 hours in bed each night.
Results show that meal intake remained similar in the two conditions, but subjects consumed more energy from snacks during the period of sleep restriction. The carbohydrate content of snacks also increased during restricted sleep.
Energy expenditure was comparable during the two sleep conditions, as were the levels of leptin and ghrelin, two hormones involved in appetite regulation.
According to the American Academy of Sleep Medicine, most adults need about seven to eight hours of sleep each night.
The SLEEP 2008 abstract book is available online at http://www.journalsleep.org/PDF/AbstractBook2008.pdf.
Internet, Aerobic Exercise May Help People with Insomnia
Two studies being presented as poster presentations this morning at SLEEP 2008 offer hope to those who suffer from insomnia.
A study (ID# 0716) of 44 participants shows that a self-help program delivered via the Internet can significantly improve insomnia in adults. Individuals in the study group had an average age of 45 years, and 77 percent were women.
Participants reported having an average of five nights per week of sleep difficulties for about 10 years. The study involved a six-week, structured, interactive, self-guided, and tailored intervention that took traditional face-to-face cognitive behavioral therapy and transformed it for delivery via the Internet.
Results show that sleep improved significantly over the six-week period. Sleep efficiency (i.e., the percentage of time in bed spent sleeping) improved from 66 percent to 88 percent. The average nightly total sleep time of the participants increased by 80 minutes.
Another study (ID# 0737) of 36 adults with chronic primary insomnia suggests that moderate aerobic exercise can help people with insomnia get some sleep.
The study involved 28 women and 8 men with an average age of 44 years. Results show that a 50-minute session of moderate aerobic exercise on a treadmill improved numerous measures of sleep quality. It decreased sleep onset latency (i.e., the amount of time it takes to fall asleep) by 54 percent and decreased wake time in bed by 36 percent after the exercise session.
The session of moderate aerobic exercise, which began at 6 p.m., also increased total sleep time by 21 percent and increased sleep efficiency by 18 percent.
Similar results were not achieved with either heavy aerobic exercise or moderate strength exercise. Heavy aerobic exercise involved three periods of 10 minutes of exercise on a treadmill alternating with 10 minutes of rest. Strength exercise lasted about 50 minutes and involved: shoulder press, chest press, vertical traction, leg press, leg curl, leg extension, abdominal crunch and lower back.
The SLEEP 2008 abstract book is available online at http://www.journalsleep.org/PDF/AbstractBook2008.pdf.
A study (ID# 0716) of 44 participants shows that a self-help program delivered via the Internet can significantly improve insomnia in adults. Individuals in the study group had an average age of 45 years, and 77 percent were women.
Participants reported having an average of five nights per week of sleep difficulties for about 10 years. The study involved a six-week, structured, interactive, self-guided, and tailored intervention that took traditional face-to-face cognitive behavioral therapy and transformed it for delivery via the Internet.
Results show that sleep improved significantly over the six-week period. Sleep efficiency (i.e., the percentage of time in bed spent sleeping) improved from 66 percent to 88 percent. The average nightly total sleep time of the participants increased by 80 minutes.
Another study (ID# 0737) of 36 adults with chronic primary insomnia suggests that moderate aerobic exercise can help people with insomnia get some sleep.
The study involved 28 women and 8 men with an average age of 44 years. Results show that a 50-minute session of moderate aerobic exercise on a treadmill improved numerous measures of sleep quality. It decreased sleep onset latency (i.e., the amount of time it takes to fall asleep) by 54 percent and decreased wake time in bed by 36 percent after the exercise session.
The session of moderate aerobic exercise, which began at 6 p.m., also increased total sleep time by 21 percent and increased sleep efficiency by 18 percent.
Similar results were not achieved with either heavy aerobic exercise or moderate strength exercise. Heavy aerobic exercise involved three periods of 10 minutes of exercise on a treadmill alternating with 10 minutes of rest. Strength exercise lasted about 50 minutes and involved: shoulder press, chest press, vertical traction, leg press, leg curl, leg extension, abdominal crunch and lower back.
The SLEEP 2008 abstract book is available online at http://www.journalsleep.org/PDF/AbstractBook2008.pdf.
Children Who Snore Have Higher Heart Rates
A study (ID# 0253) being presented as a poster presentation this morning at SLEEP 2008 shows that snoring has a significant impact on the cardiovascular functioning of children during sleep.
The study involved 40 children with an average age of 8 years. Children with severe obstructive sleep apnea (OSA) had the highest average heart rate of 92 beats per minute (bpm). Children with primary snoring had an average heart rate of 82 bpm, which was higher than children with moderate OSA (76 bpm) and children with mild OSA (74 bpm). The heart rate of matched controls was 71 bpm.
The abstract authors conclude that these results challenge the notion that snoring is harmless.
According to the American Academy of Sleep Medicine, the incidence of snoring in children is reported to be 10 percent to 12 percent.
The SLEEP 2008 abstract book is available online at http://www.journalsleep.org/PDF/AbstractBook2008.pdf.
The study involved 40 children with an average age of 8 years. Children with severe obstructive sleep apnea (OSA) had the highest average heart rate of 92 beats per minute (bpm). Children with primary snoring had an average heart rate of 82 bpm, which was higher than children with moderate OSA (76 bpm) and children with mild OSA (74 bpm). The heart rate of matched controls was 71 bpm.
The abstract authors conclude that these results challenge the notion that snoring is harmless.
According to the American Academy of Sleep Medicine, the incidence of snoring in children is reported to be 10 percent to 12 percent.
The SLEEP 2008 abstract book is available online at http://www.journalsleep.org/PDF/AbstractBook2008.pdf.
Is Sleep the Secret to Successful Aging for Women?
A study (ID# 0305) being presented as a poster presentation this morning at SLEEP 2008 reinforces the importance of normal sleep for the healthy aging of women.
The study involved 2,226 women who were 60 years of age or older. Nearly 21 percent of the women were determined to be “successful agers.” Measures of successful aging included independent living, active engagement with life, life satisfaction and well-being, freedom from disability and the absence of physical disease.
Women who reported less sleep disturbance on an insomnia rating scale were more likely to be successful agers. Successful aging was best predicted by less daytime napping and fewer complaints of sleep maintenance insomnia (i.e., when awakenings occur during the night).
An increased severity of sleep disturbance predicted lower self-ratings of “successful aging” and a greater difference between perceived and actual age.
According to the American Academy of Sleep Medicine, women tend to describe sleep problems using different terms than men. Women may be less likely to say that they feel sleepy during the day. Instead women often describe feeling tired, unrested or fatigued. They also may report an overall lack of energy or vitality.
The SLEEP 2008 abstract book is available online at http://www.journalsleep.org/PDF/AbstractBook2008.pdf.
The study involved 2,226 women who were 60 years of age or older. Nearly 21 percent of the women were determined to be “successful agers.” Measures of successful aging included independent living, active engagement with life, life satisfaction and well-being, freedom from disability and the absence of physical disease.
Women who reported less sleep disturbance on an insomnia rating scale were more likely to be successful agers. Successful aging was best predicted by less daytime napping and fewer complaints of sleep maintenance insomnia (i.e., when awakenings occur during the night).
An increased severity of sleep disturbance predicted lower self-ratings of “successful aging” and a greater difference between perceived and actual age.
According to the American Academy of Sleep Medicine, women tend to describe sleep problems using different terms than men. Women may be less likely to say that they feel sleepy during the day. Instead women often describe feeling tired, unrested or fatigued. They also may report an overall lack of energy or vitality.
The SLEEP 2008 abstract book is available online at http://www.journalsleep.org/PDF/AbstractBook2008.pdf.
Child Sleep Patterns around the World
A study (ID# 0185) being presented as an oral presentation this morning at SLEEP 2008 compares the sleep patterns of young children from 12 different countries. Results are based on questionnaires completed by the parents of 21,273 infants and toddlers from zero to 36 months of age.
The study indicates that young children in predominately Caucasian countries have earlier bedtimes and obtain more overall sleep than young children in predominately Asian countries. No differences were found in night wakings or napping behaviors.
Children in New Zealand went to bed the earliest with an average bedtime of 7:16 p.m. Children in Hong Kong went to bed the latest with an average bedtime of 10:10 p.m. U.S. children had an average bedtime of 8:52 p.m.
Japanese children had the lowest total sleep time (i.e., nightly sleep plus daytime naps) of 11.6 hours of sleep per day. Children in New Zealand had the highest total sleep time of 13.3 hours of sleep. U.S. children averaged 12.9 hours of total sleep time per day.
Seventy-six percent of Chinese parents perceived that their child has a small or severe sleep problem. Only 11 percent of parents in Taiwan responded similarly.
According to the American Academy of Sleep Medicine, newborns up to three months of age need about 16 to 20 hours of total sleep time per day, while infants between three and 12 months old need 14 to 15 hours of total sleep time. Toddlers between the ages of one and four years need about 12 to 14 hours of total sleep time.
The SLEEP 2008 abstract book is available online at http://www.journalsleep.org/PDF/AbstractBook2008.pdf.
The study indicates that young children in predominately Caucasian countries have earlier bedtimes and obtain more overall sleep than young children in predominately Asian countries. No differences were found in night wakings or napping behaviors.
Children in New Zealand went to bed the earliest with an average bedtime of 7:16 p.m. Children in Hong Kong went to bed the latest with an average bedtime of 10:10 p.m. U.S. children had an average bedtime of 8:52 p.m.
Japanese children had the lowest total sleep time (i.e., nightly sleep plus daytime naps) of 11.6 hours of sleep per day. Children in New Zealand had the highest total sleep time of 13.3 hours of sleep. U.S. children averaged 12.9 hours of total sleep time per day.
Seventy-six percent of Chinese parents perceived that their child has a small or severe sleep problem. Only 11 percent of parents in Taiwan responded similarly.
According to the American Academy of Sleep Medicine, newborns up to three months of age need about 16 to 20 hours of total sleep time per day, while infants between three and 12 months old need 14 to 15 hours of total sleep time. Toddlers between the ages of one and four years need about 12 to 14 hours of total sleep time.
The SLEEP 2008 abstract book is available online at http://www.journalsleep.org/PDF/AbstractBook2008.pdf.
Tuesday, June 10, 2008
Neck Size a Predictor of OSA in Children
A study being presented as an oral presentation this afternoon at SLEEP 2008 describes the link between neck size and obstructive sleep apnea in children.
The study examined the records of 242 children between two and 18 years of age. The actual neck size of each patient was adjusted for age to obtain the child’s percent deviation from predicted neck size (DPN).
DPN showed a high correlation with apnea-hypopnea index (AHI), a measure of the severity of obstructive sleep apnea (OSA). DPN showed a higher association with AHI than did body mass index (BMI) or tonsil size.
These results show that DPN may provide a more anatomically specific risk factor for OSA in children than obesity measures such as BMI.
According to the American Academy of Sleep Medicine, OSA occurs in about two percent of young children. It can develop in children at any age, but it is most common in preschoolers. OSA often occurs between the ages of 3 and 6 years when the tonsils and adenoids are large compared to the throat.
The study examined the records of 242 children between two and 18 years of age. The actual neck size of each patient was adjusted for age to obtain the child’s percent deviation from predicted neck size (DPN).
DPN showed a high correlation with apnea-hypopnea index (AHI), a measure of the severity of obstructive sleep apnea (OSA). DPN showed a higher association with AHI than did body mass index (BMI) or tonsil size.
These results show that DPN may provide a more anatomically specific risk factor for OSA in children than obesity measures such as BMI.
According to the American Academy of Sleep Medicine, OSA occurs in about two percent of young children. It can develop in children at any age, but it is most common in preschoolers. OSA often occurs between the ages of 3 and 6 years when the tonsils and adenoids are large compared to the throat.
Benefits of Receiving Care at AASM-Accredited Sleep Centers
Two studies being presented as poster presentations today at SLEEP 2008 describe benefits of receiving medical care from American Academy of Sleep Medicine-accredited sleep centers and from board certified sleep specialists.
One ongoing study (ID# 1069) of 243 patients at four participating sleep centers found that patients cared for by AASM-accredited centers and board-certified physicians received better education than patients cared for by non-accredited centers and non-certified physicians.
One-hundred percent of study subjects at AASM-accredited centers reported receiving adequate education about obstructive sleep apnea (OSA). At non-accredited sites, 83.5 percent of study subjects reported receiving adequate education about OSA.
AASM Standards for Accreditation require that accredited sleep centers have on staff at least one board-certified sleep specialist. Initial results of this study were published in the Journal of Clinical Sleep Medicine in 2006.
Another study (ID# 1073) of 55 patients shows that access to specialized services with close follow up in an AASM-accredited sleep center can make a significant difference in treatment success. Each of the patients had a high risk of failure to comply with continuous positive airway pressure therapy (CPAP) for OSA. Sixty-one percent of the patients became compliant and were followed up for six months.
One ongoing study (ID# 1069) of 243 patients at four participating sleep centers found that patients cared for by AASM-accredited centers and board-certified physicians received better education than patients cared for by non-accredited centers and non-certified physicians.
One-hundred percent of study subjects at AASM-accredited centers reported receiving adequate education about obstructive sleep apnea (OSA). At non-accredited sites, 83.5 percent of study subjects reported receiving adequate education about OSA.
AASM Standards for Accreditation require that accredited sleep centers have on staff at least one board-certified sleep specialist. Initial results of this study were published in the Journal of Clinical Sleep Medicine in 2006.
Another study (ID# 1073) of 55 patients shows that access to specialized services with close follow up in an AASM-accredited sleep center can make a significant difference in treatment success. Each of the patients had a high risk of failure to comply with continuous positive airway pressure therapy (CPAP) for OSA. Sixty-one percent of the patients became compliant and were followed up for six months.
Is Circadian Advantage a Home Run for MLB Teams?
A study funded by Major League Baseball (ID# 0165) that is being presented as a poster presentation this morning at SLEEP 2008 examined the effect of circadian timing on the outcome of MLB games.
The analysis of 24,133 games from 1997 to 2006 found that in 79 percent of the games, both teams were “at home” in the current time zone. In the remaining 5,046 games, the team with the circadian advantage won about 52 percent of the games.
The study found that the magnitude of circadian advantage influenced success. The winning percentage for teams with a three-hour circadian advantage increased to 60.3 percent. The direction in which teams traveled did not appear to influence the outcome of games.
This study is a follow-up to a 2005 study that analyzed the results of MLB games from 2004. That study found that teams performed better traveling eastward than they did traveling westward. The initial research abstract was presented in 2005.
According to the American Academy of Sleep Medicine, jet lag is a circadian rhythm sleep disorder that occurs when a long trip across time zones quickly puts you in a place where you need to sleep and wake at a time that is different than what your internal body clock expects. Symptoms can include disturbed sleep, decreased alertness and impaired functioning.
The SLEEP 2008 abstract book is available online at http://www.journalsleep.org/PDF/AbstractBook2008.pdf.
The analysis of 24,133 games from 1997 to 2006 found that in 79 percent of the games, both teams were “at home” in the current time zone. In the remaining 5,046 games, the team with the circadian advantage won about 52 percent of the games.
The study found that the magnitude of circadian advantage influenced success. The winning percentage for teams with a three-hour circadian advantage increased to 60.3 percent. The direction in which teams traveled did not appear to influence the outcome of games.
This study is a follow-up to a 2005 study that analyzed the results of MLB games from 2004. That study found that teams performed better traveling eastward than they did traveling westward. The initial research abstract was presented in 2005.
According to the American Academy of Sleep Medicine, jet lag is a circadian rhythm sleep disorder that occurs when a long trip across time zones quickly puts you in a place where you need to sleep and wake at a time that is different than what your internal body clock expects. Symptoms can include disturbed sleep, decreased alertness and impaired functioning.
The SLEEP 2008 abstract book is available online at http://www.journalsleep.org/PDF/AbstractBook2008.pdf.
Do You Sleep Like You Eat?
Two studies from Brazil that are being presented as poster presentation this morning at SLEEP 2008 address the relationship between your sleep and the food you eat. Both studies involved 52 healthy subjects between the ages of 20 and 45 years.
One study (ID# 0084) found that both total energy intake and late-night snack energy intake are significantly correlated with awakenings during sleep. Both measures of energy intake also were correlated with apnea-hypopnea index, a measurement of the severity of obstructive sleep apnea.
Another study (ID# 0085) found that total fat intake is related to a number of sleep measures, including percentage of REM sleep, arousal index and apnea-hypopnea index. The study also found that fat intake at dinner is associated with sleep measures such as sleep efficiency and REM percentage. The results show that total fat intake and dinner fat intake seem to have a negative influence on the sleep pattern of healthy adults.
The SLEEP 2008 abstract book is available online at http://www.journalsleep.org/PDF/AbstractBook2008.pdf.
One study (ID# 0084) found that both total energy intake and late-night snack energy intake are significantly correlated with awakenings during sleep. Both measures of energy intake also were correlated with apnea-hypopnea index, a measurement of the severity of obstructive sleep apnea.
Another study (ID# 0085) found that total fat intake is related to a number of sleep measures, including percentage of REM sleep, arousal index and apnea-hypopnea index. The study also found that fat intake at dinner is associated with sleep measures such as sleep efficiency and REM percentage. The results show that total fat intake and dinner fat intake seem to have a negative influence on the sleep pattern of healthy adults.
The SLEEP 2008 abstract book is available online at http://www.journalsleep.org/PDF/AbstractBook2008.pdf.
Sleep Loss, Alzheimer’s and Sleep Apnea
A study (ID# 0291) being presented as an oral presentation this morning at SLEEP 2008 evaluated 52 older adults who have both Alzheimer’s disease (AD) and obstructive sleep apnea (OSA).
When the study subjects were treated with continuous positive airway pressure (CPAP) therapy, the resulting increase in total sleep time was significantly associated with improvements in neurocognitive testing.
No other variables, including changes in oxygenation, were significant. This implies that the cognitive impairment associated with OSA in AD patients may result from short sleep time.
The American Academy of Sleep Medicine reports that the steepest prevalence increase for OSA is in the transition from middle-aged to older-aged adults. According to the National Institute on Aging, up to 4.5 million Americans suffer from AD, which usually begins after the age of 60.
The SLEEP 2008 abstract book is available online at http://www.journalsleep.org/PDF/AbstractBook2008.pdf.
When the study subjects were treated with continuous positive airway pressure (CPAP) therapy, the resulting increase in total sleep time was significantly associated with improvements in neurocognitive testing.
No other variables, including changes in oxygenation, were significant. This implies that the cognitive impairment associated with OSA in AD patients may result from short sleep time.
The American Academy of Sleep Medicine reports that the steepest prevalence increase for OSA is in the transition from middle-aged to older-aged adults. According to the National Institute on Aging, up to 4.5 million Americans suffer from AD, which usually begins after the age of 60.
The SLEEP 2008 abstract book is available online at http://www.journalsleep.org/PDF/AbstractBook2008.pdf.
U.S. Veterans Battle Insomnia after Returning from Iraq
A study (ID# 0697) being presented as an oral presentation this morning at SLEEP 2008 shows that insomnia is a significant problem for combat-exposed U.S. soldiers returning from Iraq.
The study examined the sleep of 14 Operation Iraqi Freedom veterans who have post-deployment adjustment disorders. They were compared with 14 people who have primary insomnia and 14 good sleepers.
The veterans reported much worse sleep quality and sleep efficiency, increased time to fall asleep and wake time after falling asleep, and more nocturnal awakenings than good sleepers. Sleep measures of the veterans were similar to those of the people with primary insomnia.
The veterans also had more severe disruptive nocturnal behaviors than both good sleepers and people with primary insomnia.
A study (ID# 0736) that was presented yesterday as a poster presentation shows that U.S. veterans of the war in Iraq who struggle with insomnia may prefer treatment that combines medications with non-pharmacological approaches such as relaxation therapy. Veterans also preferred receiving therapy through MP3 files and the Internet.
Another study (ID# 0556) presented yesterday as a poster presentation reports that black veterans are significantly less likely than white or Asian veterans to adhere to continuous positive airway pressure (CPAP) therapy for obstructive sleep apnea.
The SLEEP 2008 abstract book is available online at http://www.journalsleep.org/PDF/AbstractBook2008.pdf.
The study examined the sleep of 14 Operation Iraqi Freedom veterans who have post-deployment adjustment disorders. They were compared with 14 people who have primary insomnia and 14 good sleepers.
The veterans reported much worse sleep quality and sleep efficiency, increased time to fall asleep and wake time after falling asleep, and more nocturnal awakenings than good sleepers. Sleep measures of the veterans were similar to those of the people with primary insomnia.
The veterans also had more severe disruptive nocturnal behaviors than both good sleepers and people with primary insomnia.
A study (ID# 0736) that was presented yesterday as a poster presentation shows that U.S. veterans of the war in Iraq who struggle with insomnia may prefer treatment that combines medications with non-pharmacological approaches such as relaxation therapy. Veterans also preferred receiving therapy through MP3 files and the Internet.
Another study (ID# 0556) presented yesterday as a poster presentation reports that black veterans are significantly less likely than white or Asian veterans to adhere to continuous positive airway pressure (CPAP) therapy for obstructive sleep apnea.
The SLEEP 2008 abstract book is available online at http://www.journalsleep.org/PDF/AbstractBook2008.pdf.
Monday, June 9, 2008
Oral Presentations Describe Research Linking Sleep to ADHD, Suicidal Symptoms
Research abstracts being presented as oral presentations this afternoon at SLEEP 2008 link sleep problems to attention-deficit/hyperactivity disorder (ADHD) and suicidal symptoms.
In a study of 882 ninth-grade students (ID# 0321), teens reported sleeping an average of 7.6 hours per school night. According to the American Academy of Sleep Medicine, teens need a little more than nine hours of sleep each night.
Getting less sleep on school nights increased students’ risk of having emotional disturbances and ADHD. Every additional hour of sleep on school nights decreased the risk of emotional disturbance by 25 percent and decreased the risk of ADHD by 34 percent.
In another study of 322 undergraduates at a large university (ID# 0958), sleep quality and insomnia severity were significantly associated with an increased risk of depression. Severe insomnia also was a significant predictor of an increased severity of suicidal thoughts. After controlling for depression, sleep quality and insomnia severity jointly predicted an increased severity of suicidal thoughts.
The SLEEP 2008 abstract book is available online at http://www.journalsleep.org/PDF/AbstractBook2008.pdf.
In a study of 882 ninth-grade students (ID# 0321), teens reported sleeping an average of 7.6 hours per school night. According to the American Academy of Sleep Medicine, teens need a little more than nine hours of sleep each night.
Getting less sleep on school nights increased students’ risk of having emotional disturbances and ADHD. Every additional hour of sleep on school nights decreased the risk of emotional disturbance by 25 percent and decreased the risk of ADHD by 34 percent.
In another study of 322 undergraduates at a large university (ID# 0958), sleep quality and insomnia severity were significantly associated with an increased risk of depression. Severe insomnia also was a significant predictor of an increased severity of suicidal thoughts. After controlling for depression, sleep quality and insomnia severity jointly predicted an increased severity of suicidal thoughts.
The SLEEP 2008 abstract book is available online at http://www.journalsleep.org/PDF/AbstractBook2008.pdf.
Blame the Cell Phone, Early School Start Times for Teen Sleep Loss?
A research abstract being presented as a poster presentation today at SLEEP 2008 provides an interesting explanation for why some teens may not be sleeping well: They spend too much time on the cell phone.
The study of 21 teens (ID# 0249) shows that those who have more than 15 calls and/or 15 text messages a day are more likely to sleep poorly than teens who make less than five calls and/or send five text messages a day.
Excessive cell-phone users are more prone to disrupted sleep, restlessness, stress and fatigue. They also have more trouble waking up in the morning and are more tired before mid-day.
One member of the study group had more than 200 text messages per day. Only one of the 21 participants turned the cell phone off at night.
Another abstract presentation (ID# 0226) addresses a common cause of teen sleep loss: early school start times.
Following a 40-minute delay in the school start time from 7:35 a.m. to 8:15 a.m., students’ total sleep time on school nights increased by 33 minutes per night from 7 hours and 2 minutes to 7 hours and 35 minutes. Students went to bed about eight minutes later at night, but they slept in 41 minutes later in the morning, waking up at 6:53 a.m. instead of 6:12 a.m.
More students reported having “no problem” with sleepiness after the schedule change.
The American Academy of Sleep Medicine recommends that teens get a little more than nine hours of sleep each night to feel alert and well rested during the day.
The SLEEP 2008 abstract book is available online at http://www.journalsleep.org/PDF/AbstractBook2008.pdf.
The study of 21 teens (ID# 0249) shows that those who have more than 15 calls and/or 15 text messages a day are more likely to sleep poorly than teens who make less than five calls and/or send five text messages a day.
Excessive cell-phone users are more prone to disrupted sleep, restlessness, stress and fatigue. They also have more trouble waking up in the morning and are more tired before mid-day.
One member of the study group had more than 200 text messages per day. Only one of the 21 participants turned the cell phone off at night.
Another abstract presentation (ID# 0226) addresses a common cause of teen sleep loss: early school start times.
Following a 40-minute delay in the school start time from 7:35 a.m. to 8:15 a.m., students’ total sleep time on school nights increased by 33 minutes per night from 7 hours and 2 minutes to 7 hours and 35 minutes. Students went to bed about eight minutes later at night, but they slept in 41 minutes later in the morning, waking up at 6:53 a.m. instead of 6:12 a.m.
More students reported having “no problem” with sleepiness after the schedule change.
The American Academy of Sleep Medicine recommends that teens get a little more than nine hours of sleep each night to feel alert and well rested during the day.
The SLEEP 2008 abstract book is available online at http://www.journalsleep.org/PDF/AbstractBook2008.pdf.
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